Eobeet s



No. 61,266. PATENTED JAN. 15, 1867.

w R. SANDERSON.

STEAM GOVERNOR.

WW %1, I ZMa/ZT the action oi the eccentric upon the lever forces itin the opposite directiom-and the pawl K', catching in the nctclnforces the arm to'the left, and thereby opens the-ports in the reverse-of. that above described, and when opened the same distance thepawl slips from the notch and the arm again returns to its vertical place as before, and so on,alternatcly, the arm is moved from rightto left and from left to right, and at each time returning to its vertical position before it is caught by the pawl; hence the ports nroopcnod and .closed alternately by the oscillating of the valve by means of the arm and pawls. v The means by which the arm regains its vertical position and thereby closing the ports is by the weighted bail P. This bail consists of a pairof bent legs reaching down to and resting upon the toes H. Projecting, upward from the top of the bail is a stein, Q; this'stem passes through a frame,-R, which serves as a guide, and by means of which it is stayed in place. This stem is mounted witha-heavy veightor ball S, all of whioh,asabove observed, rest upon the toes H, and thercbybringing them to a horizontal line across the front and the arm I into a vertical relation to them when released from the action of tho pawls. It is'obvious that when the pawl forces the arm from its vertical position in either directiomto the right or to-the left,the weight of the bail is supported by the right or left toe only, and itlis raised upward thcreby until the pawl slips from the notch, the weight being thus on one side of the rQck-ShafQ eanses it to turn until thcioppositetce strikes its relative limb of the bail, which brings the two horizontaily' across the front, as seen in fig. 5,-and as a'conseqncnce the arm is broughtto a vertical position and at the same time closing the ports, thereby shutting of? the steam. It will be. remarked that the 'vblume of steam admitted to the cylinder'will be in proportion to the opening of the ports. This measure is regulated by the yoke L, above referred to, as follows: Thegovernor being attached to the lever M, when the balls expand causes the lever to rise up'wardand at the same time raises up :the yoke Into which it is connected. I The upper end of this yoke, as above mentioned, being made slantingor pointed, the pawls slide upon it and are thereby'preventedfrom falling as deeply into the notch as they would do in the absence of the yoke, and are lifted out of the notch'sooner, so that the oscillation of the valves is lessened as the yoke is raiscdup by the expanding of the governor, caused by the increased speed of the engine; the amount of steam is thereby diminishedand thespeedof the engine correspoiniingly retarded. On

the other hand, when the volume of steam issmall'the balls drop and thereby cause the-valve to open and admit more steam; hence the action of the valves is re'adilyand at'all times controlled by the governor, and the amount misteam truly and uniformly admitted to the cylinder. Should the action of the engine be-so great as to cause the balls'of the governor to expand to their full extent, the yoke is lifted above the arm so that the pawls cannot catch into the notch but slide over the end of the arntupon the yoke, and by these means the ports are closed, and as a. consequence the engine stopped or retarded, so that the yoke allows the pawl to again operate the valves as before. Should any accident occur to the'governor, as-a slipping or breaking of the belt,

connecting-limbs, &c., and thereby cause a full-opening of the ports and the admission of a full head of steam, causing by this means an intense action of the engine,'which often'results in a break-down or a dangerous straining of the machinery connected thercto, in order to prevent such results from the suspension of the action of the governor, the yoke N, above referred to, is introduced and operated, as above described, in connection with the lever M, As before stated, when the lever M is forced down by the action of the governor, the lever O rises,.and' in so doing pushes up the yoke N, and if the action of the lever M be sufiicieiit, which would be the case should the governor cease to operate, the.yoke iii raised above the top of the arm I, as shown in fig. 5', and

the pawls prevented from catching into the arm but slide backward and forward upon the tone? the yoke, and thereby allows the weighted bail to bring the arm .into a-v ertical position, and by this means-shut ofi'.thc

vsteam; the engine, as a necessary result, comes to a stop,which would not be the case were it not for the yoke,

for the ports are open when the yoke L is down, or rather may be operated bythe pawls when in that position, and, as above stated, when the lever is not operated by the governorbut falls down by its own weight in conse: quence of some accident to the governor, and thereby admitting a fnllfhead of steam. It is then, by the revel-sanction of the yoke-N, cut ofi', as bcfor'c mentioned, and all danger, to the engine and machinery avoided.

" What I claim as my improvement, and desire to secure .by Letters Patent, is-- y The auxiliary lever O,'yoke N, and pivot joint 6', extending through the lever M, in combination with the.

lever'J, peyvlsK- K-{lifting toes H, bail P, and yoke L, as andfor the purpose set forth.

' Y ROBERT sANDnnsoN;

Witnesses:

W. H. Btmnrnon, J. Homins. 

